[Octave-bug-tracker] [bug #45407] regexprep returns unescaped string in ML but not Octave

[Rik]

Update of bug #45407 (project octave):

              Item Group:    Matlab Compatibility => WTF, Matlab?!?         

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Follow-up Comment #6:

This seems to be buggy Matlab behavior.  Escape sequences are not processed in
ordinary single-quoted strings.  Okay, that is the same as Octave.


'x\.y'
ans = x\.y


In places where a single-quoted string does undergo escape processing, such as
the format string for the *printf family of functions, Matlab does strict
validation and warns when an escape sequence is invalid.  Okay, that is also
the same as Octave.


x = sprintf ('x\.y')
warning: unrecognized escape sequence '\.' -- converting to '.'


So only in the replacement string of regexprep are escape sequences simply
converted the the character that follows the backslash?  *Sigh*.

I changed the Item Group to 'WTF Matlab!?!'.  I can change this in Octave, but
it screws up strsplit.m which then needs recoding.  Just to be certain, what
do these return?


regexprep ('s', '(s)', '\\$1')
regexprep ('s', '(s)', '\\\\$1')




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